The Effectiveness of LeGEM. We answer Q1. With LeGEM, MARL methods get enhanced performance as shown in Fig. REF . Without LeGEM, all methods perform poorly in Stag-Hunter Game; IQL and VDN's final final results are even 0. By incorporating LeGEM, all of them can get converged performance and improved sample efficiency. We are also interested in finding if LeGEM could reinforce the performance of simple methods. As depicted in Fig. REF , with LeGEM, both VDN and QMIX outperforms QPLEX, which is a state-of-the-art MARL method armed with various advanced techniques, including attention network [1]}, dueling network [2]} and advantage function.
